Clean Room Matting4 Packs of 30 Adhesive surface removes dirt and dust from shoes and equipment wheels Ideal for reducing contamination in clean rooms and controlled environments Each layer can be used multiple times and removed once dirty Place on tile, concrete or low profile carpeting Sold per: Case of 4 Width: 2' Length: 3 3 4' Backing Thickness: 1. 57 mils Material: Polyethylene No. of Sheets: 30